import auth from '@/plugins/auth'
import router, { constantRoutes, dynamicRoutes } from '@/router'
import { getRouters } from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'


const permission = {
    state: {
        routes: [],
        addRoutes: [],
        defaultRoutes: [],
        topbarRouters: [],
        sidebarRouters: [],
        sidebarRoutersBaseMuen: [],
        baseHostSync: ""
    },
    mutations: {
        SET_ROUTES: (state, routes) => {
            state.addRoutes = routes
            state.routes = constantRoutes.concat(routes)
        },
        SET_DEFAULT_ROUTES: (state, routes) => {
            state.defaultRoutes = constantRoutes.concat(routes)
        },
        SET_TOPBAR_ROUTES: (state, routes) => {
            // 顶部导航菜单默认添加统计报表栏指向首页
            // const index = [{
            //   path: 'index',
            //   meta: { title: '统计报表', icon: 'dashboard' }
            // }]
            state.topbarRouters = routes

            // state.topbarRouters = routes.concat([]);
        },
        SET_ROUTER_BAR: (state, routes) => {
            state.sidebarRouters = filterAsyncRouter(routes.route)
            sessionStorage.setItem("router", routes.path.path)
        },
        SET_SIDEBAR_ROUTERS: (state, routes) => {
            // state.sidebarRoutersBaseMuen = routes
            state.sidebarRouters = routes
        },
        SET_SIDEBAR_ROUTERS_DEFAULT: (state, routes) => {
            state.sidebarRouters = routes
        },
        SET_BASE_HOST_ASYNC: (state, routes) => {
            state.baseHostSync = routes
        },

    },
    actions: {
        // topNav
        SetTopNav({ commit ,state}, key){
            let tagNav = state.defaultRoutes.filter(fis => fis.path == key)[0]
            if(tagNav){
                // 存在节点
                commit('SET_SIDEBAR_ROUTERS_DEFAULT', tagNav.children)
            }
        },
        // 二级路由重新set
        SetRouterSideBar({ commit }, ActiveRoute) {
            console.log(ActiveRoute,'ActiveRouteActiveRouteActiveRoute')
            commit('SET_ROUTER_BAR', ActiveRoute)
            commit('SET_BASE_HOST_ASYNC', ActiveRoute.path.path)
        },
        // 生成路由
        GenerateRoutes({ commit, rootState }) {
            console.log(rootState.system)
            return new Promise(resolve => {
                // 向后端请求路由数据
                getRouters().then(res => {
                    const sdata = JSON.parse(JSON.stringify(res.data))
                    const rdata = JSON.parse(JSON.stringify(res.data))
                    const sidebarRoutes = filterAsyncRouter(sdata)
                    const rewriteRoutes = filterAsyncRouter(rdata, false, true)
                    const asyncRoutes = filterDynamicRoutes(dynamicRoutes);
                    rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
                    router.addRoutes(asyncRoutes);
                    rootState.system.isNavIndex ? commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes)) : commit('SET_SIDEBAR_ROUTERS_DEFAULT', constantRoutes.concat(sidebarRoutes))
                    rootState.system.isNavIndex ? "" : commit('SET_BASE_HOST_ASYNC', "")
                    commit('SET_ROUTES', rewriteRoutes)
                    commit('SET_DEFAULT_ROUTES', sidebarRoutes)
                    commit('SET_TOPBAR_ROUTES', sidebarRoutes)
                    resolve(rewriteRoutes)
                })
            })
        }
    }
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
    return asyncRouterMap.filter(route => {
        if (type && route.children) {
            route.children = filterChildren(route.children)
        }
        if (route.component) {
            // Layout ParentView 组件特殊处理
            if (route.component === 'Layout') {
                route.component = Layout
            } else if (route.component === 'ParentView') {
                route.component = ParentView
            } else if (route.component === 'InnerLink') {
                route.component = InnerLink
            } else {
                route.component = loadView(route.component)
            }
        }
        if (route.children != null && route.children && route.children.length) {
            route.children = filterAsyncRouter(route.children, route, type)
        } else {
            delete route['children']
            delete route['redirect']
        }
        return true
    })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach(el => {
    el.path = lastRouter ? lastRouter.path + '/' + el.path : el.path
    if (el.children && el.children.length && el.component === 'ParentView') {
      children = children.concat(filterChildren(el.children, el))
    } else {
      children.push(el)
    }
  })
  return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
    const res = []
    routes.forEach(route => {
        if (route.permissions) {
            if (auth.hasPermiOr(route.permissions)) {
                res.push(route)
            }
        } else if (route.roles) {
            if (auth.hasRoleOr(route.roles)) {
                res.push(route)
            }
        }
    })
    return res
}

export const loadView = (view) => {
    if (process.env.NODE_ENV === 'development') {
        return (resolve) => require([`@/views/${view}`], resolve)
    } else {
        // 使用 import 实现生产环境的路由懒加载
        return () =>
            import(`@/views/${view}`)
    }
}

export default permission
